20011102221 has 8 divisors (see below), whose sum is σ = 29107057824. Its totient is φ = 12127940720.

The previous prime is 20011102171. The next prime is 20011102249. The reversal of 20011102221 is 12220111002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20011102221 - 2¹⁸ = 20010840077 is a prime.

It is a super-2 number, since 2×20011102221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011102197 and 20011102206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011102421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303198486 + ... + 303198551.

It is an arithmetic number, because the mean of its divisors is an integer number (3638382228).

Almost surely, 2^20011102221 is an apocalyptic number.

It is an amenable number.

20011102221 is a deficient number, since it is larger than the sum of its proper divisors (9095955603).

20011102221 is a wasteful number, since it uses less digits than its factorization.

20011102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606397051.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20011102221 its reverse (12220111002), we get a palindrome (32231213223).

The spelling of 20011102221 in words is "twenty billion, eleven million, one hundred two thousand, two hundred twenty-one".